For anyone who doesn’t know how to use Gimp or the other similar layered programs. Just felt like doing a how-to, lol. 🙂
2. On another layer go over the lines you want to keep with a thinner brush of a different color. Lowering the transparency of the previous layer makes it easier to see what you’re doing. Making the previous layer invisible lets you see the lines much more clearly and what it’s going to look like; any changes that need to be made should be made now.
3. Black lines. These lines you don’t want to have to change. (I often end up adjusting these too, though.)
4. Extra black lines go on a separate layer. This is so you can select and fill the clear regions of the black lines layer.
5. Color! Use “wand” tool to select enclosed areas on the black lines layer. Create a new layer and fill the selection with your desired color. (A new layer for each color may be preferable.) Click Select>To Path, then Select>None, then Edit>Stroke Path. (Choose an appropriate stroke width.) This gets rid of the white line left by the selection. [Hey, if you know a better way to do this, please tell me! =D]
Export as whatever file format you want (.png, .jpg etc.) because .xcf is only for editing inside Gimp. Aaand you’re done! Hope that was useful! =)